Reply To: Better Drone
DLC files are currently un-moddable. This is not to say someone might find/create a way soon!
For some reason, the conventional way of installing mods when editing any Sky Fortress files does not work. Since the game does not change at all, or even crash, it can be concluded that the game is not ‘reading’ these files.
So one possibility is that mods of the Sky Fortress DLC require a different installation than normal mods. Another potential problem is that another launch option argument is required.